When former CIA agent Jack Ryan (Harrison Ford) hampers an IRA terrorist attack in London, he kills one of the terrorists. The dead man's brother, another member of the group named Sean Miller (Sean Bean), is arrested but quickly escapes. Vowing revenge against Ryan, Miller travels to the United States, where he forces Ryan's wife (Anne Archer) and daughter (Thora Birch) into a car accident that badly injures them. This convinces Ryan to rejoin the CIA in order to track down Miller.
